Received 3 December 2008
aCollege of Sciences, Nanjing University of Technology, Nanjing, 210009, People's Republic of China, and bState Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People's Republic of China
Correspondence e-mail: firstname.lastname@example.org
In the title salt, C7H8N3+·HSO4-, the benzimdazole ring system is planar [mean deviation 0.0086 (1) Å]. In the crystal, N-HO and O-HO hydrogen-bond interactions give rise to a layer motif.
Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: NG2522 ).
WH acknowledges the National Natural Science Foundation of China (No. 20871065) and the Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry, for financial aid.
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